Add the ability to use custom Nagios plugins

Change-Id: Ib309499140994448d7b3e0eef0c875c6edb3a2ac

nagios/Chart.yaml

@@ -15,7 +15,7 @@ apiVersion: v1
 appVersion: v1.0.0
 description: OpenStack-Helm Nagios
 name: nagios
-version: 0.1.12
+version: 0.1.13
 home: https://www.nagios.org
 sources:
   - https://opendev.org/openstack/openstack-helm-addons

nagios/templates/configmap-additional-plugins.yaml

@@ -0,0 +1,27 @@
+{{/*
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+   http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/}}
+
+{{- if .Values.manifests.configmap_additional_plugins }}
+{{-   $envAll := . }}
+---
+apiVersion: v1
+kind: Secret
+metadata:
+  name: nagios-additional-plugins
+type: Opaque
+data:
+{{-   range .Values.conf.nagios.additionalPlugins }}
+  {{ .name }}: {{ .content | b64enc | quote }}
+{{-   end }}
+{{- end }}

nagios/templates/deployment.yaml

@@ -239,6 +239,14 @@ spec:
 {{- end }}
             - name: pod-var-log
               mountPath: /opt/nagios/var/log
+{{- if not (empty .Values.conf.nagios.additionalPlugins) }}
+{{-   range .Values.conf.nagios.additionalPlugins }}
+            - name: additional-plugins
+              mountPath: /usr/lib/nagios/plugins/{{ .name }}
+              subPath: {{ .name }}
+              readOnly: true
+{{-   end }}
+{{- end }}
 {{- dict "enabled" .Values.manifests.certificates "name" $envAll.Values.endpoints.monitoring.auth.admin.secret.tls.internal "path" "/etc/ssl/certs" "certs" tuple "ca.crt" | include "helm-toolkit.snippets.tls_volume_mount" | indent 12 }}
       volumes:
         - name: pod-tmp
@@ -255,5 +263,9 @@ spec:
           configMap:
             name: nagios-bin
             defaultMode: 0555
+        - name: additional-plugins
+          secret:
+            secretName: nagios-additional-plugins
+            defaultMode: 0755
 {{- dict "enabled" .Values.manifests.certificates "name" $envAll.Values.endpoints.monitoring.auth.admin.secret.tls.internal | include "helm-toolkit.snippets.tls_volume" | indent 8 }}
 {{- end }}

nagios/values.yaml

@@ -321,6 +321,7 @@ pod:
 
 manifests:
   certificates: false
+  configmap_additional_plugins: false
   configmap_bin: true
   configmap_etc: true
   deployment: true
@@ -1225,4 +1226,5 @@ conf:
         use_pending_states=1
         use_ssl_authentication=0
     query_es_clauses: null
+    additionalPlugins: []
 ...

releasenotes/notes/nagios.yaml

@@ -13,4 +13,5 @@ nagios:
   - 0.1.10 Correct selenium v3 syntax
   - 0.1.11 Use quay.io/airshipit/kubernetes-entrypoint:latest-ubuntu_focal by default
   - 0.1.12 Update nagios image tag to latest-ubuntu_jammy
+  - 0.1.13 Add the ability to use custom Nagios plugins
 ...